[multiple packages] Update collection-fors to prefer final (as per updated prefer_final_in_for_each)

packages/flutter_markdown/example/lib/screens/demo_screen.dart

@@ -30,7 +30,7 @@ class DemoScreen extends StatelessWidget {
             indicatorPadding: const EdgeInsets.only(bottom: 8),
             indicatorSize: TabBarIndicatorSize.label,
             tabs: <Widget>[
-              for (String label in _tabLabels) Tab(text: label),
+              for (final String label in _tabLabels) Tab(text: label),
             ],
           ),
         ),

packages/flutter_markdown/example/lib/screens/home_screen.dart

@@ -44,7 +44,8 @@ class HomeScreen extends StatelessWidget {
           color: Colors.black12,
           child: ListView(
             children: <Widget>[
-              for (MarkdownDemoWidget demo in _demos) DemoCard(widget: demo),
+              for (final MarkdownDemoWidget demo in _demos)
+                DemoCard(widget: demo),
             ],
           ),
         ),

packages/flutter_markdown/example/lib/shared/dropdown_menu.dart

@@ -62,7 +62,7 @@ class DropdownMenu<T> extends StatelessWidget {
               isDense: true,
               value: initialValue,
               items: <DropdownMenuItem<T>>[
-                for (String item in items.keys)
+                for (final String item in items.keys)
                   DropdownMenuItem<T>(
                     value: items[item],
                     child: Container(

packages/go_router_builder/example/lib/main.dart

@@ -259,7 +259,7 @@ class PersonScreen extends StatelessWidget {
               title: Text(
                   '${person.name} ${family.name} is ${person.age} years old'),
             ),
-            for (MapEntry<PersonDetails, String> entry
+            for (final MapEntry<PersonDetails, String> entry
                 in person.details.entries)
               ListTile(
                 title: Text(

packages/in_app_purchase/in_app_purchase_android/example/lib/main.dart

@@ -458,7 +458,8 @@ class _FeatureCard extends StatelessWidget {
             children: <Widget>[
           const ListTile(title: Text('Available features')),
           const Divider(),
-          for (BillingClientFeature feature in BillingClientFeature.values)
+          for (final BillingClientFeature feature
+              in BillingClientFeature.values)
             _buildFeatureWidget(feature),
         ]));
   }

packages/web_benchmarks/lib/src/browser.dart

@@ -240,7 +240,7 @@ String _findSystemChromeExecutable() {
   } else if (io.Platform.isWindows) {
     const String kWindowsExecutable = r'Google\Chrome\Application\chrome.exe';
     final List<String> kWindowsPrefixes = <String>[
-      for (String? item in <String?>[
+      for (final String? item in <String?>[
         io.Platform.environment['LOCALAPPDATA'],
         io.Platform.environment['PROGRAMFILES'],
         io.Platform.environment['PROGRAMFILES(X86)'],

packages/webview_flutter/webview_flutter_wkwebview/lib/src/webkit_webview_controller.dart

@@ -516,7 +516,8 @@ class WebKitWebViewController extends PlatformWebViewController {
     _javaScriptChannelParams.remove(removedJavaScriptChannel);
 
     await Future.wait(<Future<void>>[
-      for (JavaScriptChannelParams params in _javaScriptChannelParams.values)
+      for (final JavaScriptChannelParams params
+          in _javaScriptChannelParams.values)
         addJavaScriptChannel(params),
       // Zoom is disabled with a WKUserScript, so this adds it back if it was
       // removed above.